//格式化扩展 by liuyu
CodeMirror.extendMode("css", {
    commentStart: "/*",
    commentEnd: "*/",
    newlineAfterToken: function(type, content) {
        return /^[;{}]$/.test(content);
    }
});

CodeMirror.extendMode("javascript", {
    commentStart: "/*",
    commentEnd: "*/",
    newlineAfterToken: function(type, content, textAfter, state) {
        if (this.jsonMode) {
            return /^[\[,{]$/.test(content) || /^}/.test(textAfter);
        } else {
            if (content == ";" && state.lexical && state.lexical.type == ")") return false;
            return /^[;{}]$/.test(content) && !/^;/.test(textAfter);
        }
    }
});

CodeMirror.extendMode("xml", {
    commentStart: "<!--",
    commentEnd: "-->",
    newlineAfterToken: function(type, content, textAfter) {
        return ( type == "tag" && />$/.test(content) || /^</.test(textAfter) ) || (  type == "tag bracket" && />$/.test(content) );
    }
});


CodeMirror.defineExtension("commentRange", function (isComment, from, to) {
    var cm = this, curMode = CodeMirror.innerMode(cm.getMode(), cm.getTokenAt(from).state).mode;
    cm.operation(function() {
        if (isComment) { // Comment range
            cm.replaceRange(curMode.commentEnd, to);
            cm.replaceRange(curMode.commentStart, from);
            if (from.line == to.line && from.ch == to.ch) // An empty comment inserted - put cursor inside
                cm.setCursor(from.line, from.ch + curMode.commentStart.length);
        } else { // Uncomment range
            var selText = cm.getRange(from, to);
            var startIndex = selText.indexOf(curMode.commentStart);
            var endIndex = selText.lastIndexOf(curMode.commentEnd);
            if (startIndex > -1 && endIndex > -1 && endIndex > startIndex) {
                // Take string till comment start
                selText = selText.substr(0, startIndex)
                    // From comment start till comment end
                    + selText.substring(startIndex + curMode.commentStart.length, endIndex)
                    // From comment end till string end
                    + selText.substr(endIndex + curMode.commentEnd.length);
            }
            cm.replaceRange(selText, from, to);
        }
    });
});


CodeMirror.defineExtension("autoIndentRange", function (from, to) {
    var cmInstance = this;
    this.operation(function () {
        for (var i = from.line; i <= to.line; i++) {
            cmInstance.indentLine(i, "smart");
        }
    });
});


CodeMirror.defineExtension("autoFormatRange", function (from, to) {
    var cm = this;
    var outer = cm.getMode(), text = cm.getRange(from, to).split("\n");
    var state = CodeMirror.copyState(outer, cm.getTokenAt(from).state);
    var tabSize = cm.getOption("tabSize");

    var out = "", lines = 0, atSol = from.ch == 0;
    function newline() {
        out += "\n";
        atSol = true;
        ++lines;
    }

    for (var i = 0; i < text.length; ++i) {
        var stream = new CodeMirror.StringStream(text[i], tabSize);
        while (!stream.eol()) {
            var inner = CodeMirror.innerMode(outer, state);
            var style = outer.token(stream, state), cur = stream.current();
            stream.start = stream.pos;
            if (!atSol || /\S/.test(cur)) {
                out += cur;
                atSol = false;
            }

            if (!atSol && inner.mode.newlineAfterToken &&
                inner.mode.newlineAfterToken(style, cur, stream.string.slice(stream.pos) || text[i+1] || "", inner.state))
                newline();
        }
        if (!stream.pos && outer.blankLine) outer.blankLine(state);
        if (!atSol)newline();
    }

    cm.operation(function () {
        cm.replaceRange(out, from, to);
        for (var cur = from.line + 1, end = from.line + lines; cur <= end; ++cur)
            cm.indentLine(cur, "smart");
        cm.setSelection(from, cm.getCursor(false));
    });
});
function getSelectedRange() {
    return { from: editor.getCursor(true), to: editor.getCursor(false) };
}

function autoFormatSelection() {
    if(editor.getSelection()==""){	//没有选中的代码时格式化全部
        formatAll();
    }else{//格式选中的代码
        var range = getSelectedRange();
        editor.autoFormatRange(range.from, range.to);
    }

}
/*
function formatAll() {
    var totalLines = editor.lineCount();
    editor.autoFormatRange({line:0, ch:0}, {line:totalLines});//格式化

    editor.scrollTo(0,0);//滚动到顶部
    editor.execCommand('goDocStart'); //光标移到文档头
   // editor.cursorCoords(true,'local');
}
*/

//全部格式化
function formatAll(){
    var pos=editor.getCursor();//获取光标位置
    let totalLines = editor.lineCount();
    editor.autoFormatRange({ line: 0, ch: 0 }, { line: totalLines });
    editor.focus();
    editor.setCursor(pos);//设置光标位置
    //CodeMirror.commands["goDocEnd"](editor);//移动到文件尾部
}